<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>v-if指令</title>
</head>
<body>
    <div id="app">
        <input type="button" value="切换显示" @click="toggleIsShow">
        <p v-if="isShow">黑马程序员</p>
        <p v-show="isShow">黑马程序员 - v-show修饰</p>
        <h2 v-if="temperature>=35">热死啦</h2>
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                isShow:false,
                temperature:20
            },
            methods: {
                toggleIsShow:function(){
                    this.isShow = !this.isShow;
                }
            },
        })
    </script>
</body>

</html>